package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.aliyun.oss.OSSClient;
import com.aliyun.oss.common.utils.HttpUtil;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.security.auth.login.LoginException;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;
    /**
     * 微信登录
     *
     * @param userLoginDTO
     * @return
     */
    public User wxLogin(UserLoginDTO userLoginDTO) throws Exception {
        String openid = getOpenid(userLoginDTO.getCode());
        //判断openid是否为空,抛出异常
        if(openid == null){
            throw new LoginException(MessageConstant.LOGIN_FAILED);
        }

        //判断当前用户是否为新用户
        User user = userMapper.getByOpenid(openid);

        if(user == null){
            user =  User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        //如果是则自动完成注册

        return user;
    }

    /**
     * 调用微信接口服务,获取openid
     * @param code
     * @return
     */
    private String getOpenid(String code){
        //调用微信接口服务,获取openid
        Map<String,String> map = new HashMap<String,String>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN,map);

        JSONObject jsonObject = JSONObject.parseObject(json);
        String openid = jsonObject.getString("openid");

        return openid;
    }
}
